CareerCup

why not use sprintf(s,"%d",num);

<pre lang="" line="1" title="CodeMonkey48221" class="run-this">public class IntegerToString
{
public static void main(String[] args)
{
int integer = -987654321;
toString(integer, 10);
}

private static void toString(int integer, int radix)
{
StringBuilder string = new StringBuilder();
boolean isNegative = (integer < 0);
integer = Math.abs(integer);

double length = Math.log(integer) / Math.log(radix);
for (int i = 0; i < length; i++)
{
string.append(integer % radix);
integer /= radix;
}
if (isNegative)
string.append("-");
System.out.println(string.reverse());
}
}</pre><pre title="CodeMonkey48221" input="yes">
</pre>

Here is one good implementation,

puddleofriddles.blogspot.com/2012/01/implement-itoa.html

#include<iostream>
using namespace std;
void reverseString(char a[], int lowIndex, int highIndex)
{
	if(lowIndex == highIndex)
		return;
	while(lowIndex < highIndex)
	{
		char tmp = a[lowIndex];
		a[lowIndex] = a[highIndex];
		a[highIndex] = tmp;
		lowIndex++;
		highIndex--;
	}
}
char* intergerToString(int n)
{
	static char a[1024]; 
	int tmp;
	int i = 0;
	if(n < 0)
		tmp = -n;
	else
		tmp = n;
	if(tmp == 0)
	{
		a[0] = '0';
		a[1] = '\0';
		return a;
	}
	else
	{
		if(n < 0)
			a[i++] = '-';
		while(tmp > 0)
		{
			
			a[i++] = tmp % 10 + '0';
			tmp /= 10;
			
		}
		i--;
		if(a[0] == '-')
			reverseString(a, 1, i);
		else
			reverseString(a, 0, i);
	}
	a[i + 1] = '\0';
	return a;
}
void printString(char *a)
{
	
	while(*a != '\0')
	{
		cout<<*a;
		a++;
	}
	cout<<endl;
}

int main()
{
	char *a = intergerToString(-12345);
	printString(a);
}

What are the various parameters involved in the printing of Polarized Hidden Image Technology.

char * StringToint(int n,char *arr)
{
if(n==0)
{
return NULL;
}
int i=0;
StringToint(n/2);
arr[i]=(n%10)+'0';
i++;
}

return arr;

}